JP2018160911A5

JP2018160911A5 -

Info

Publication number: JP2018160911A5
Application number: JP2018101439A
Authority: JP
Filing date: 2018-05-28
Publication date: 2018-11-22
Anticipated expiration: 2035-09-11

Claims

Receiving a video bitstream comprising a luminance component having a bit depth of an original luminance component, a first saturation component having a bit depth of an original saturation component, and a second saturation component;
The luminance component, the first saturation component, and the second saturation so that the luminance component, the first saturation component, and the second saturation component have the same aligned bit depth. Perform bit depth alignment on the degree component,
A video code comprising a processor configured to perform an inverse color transform based on the luminance component having the aligned bit depth, the first saturation component, and the second saturation component Device.

After the inverse color conversion, the processor returns the luminance component to the bit depth of the original luminance component, or converts the first saturation component and the second saturation component to the original saturation component. The video encoding device of claim 1, further configured to revert to bit depth.

The aligned bit depth is a higher bit depth between a bit depth of the original luminance component and a bit depth of the original saturation component, and the processor determines a component having a lower original bit depth. The video encoding device of claim 1, further configured to scale to match the aligned bit depth.

The processor is
Determining a bit depth difference between a bit depth of the original luminance component and a bit depth of the original saturation component;
The video encoding device of claim 1, further configured to left-shift a coefficient of a component having a lower original bit depth by the bit depth difference.

The processor is
The video encoding device of claim 4, further configured to right-shift the coefficients of the component having the lower original bit depth after the inverse color transform by the bit depth difference.

The video encoding device of claim 1, wherein the luminance component, the first saturation component, and the second saturation component are associated with a residual transform block.

Receiving a video bitstream comprising a luminance component having a bit depth of the original luminance component, a first saturation component having a bit depth of the original saturation component, and a second saturation component;
The luminance component, the first saturation component, and the second saturation so that the luminance component, the first saturation component, and the second saturation component have the same aligned bit depth. Performing bit depth alignment on the degree component;
Performing an inverse color transform based on the luminance component having the aligned bit depth, the first chroma component, and the second chroma component.

After the inverse color conversion, the luminance component is returned to the bit depth of the original luminance component, or the first saturation component and the second saturation component are changed to the bit depth of the original saturation component. 8. The video encoding method of claim 7, further comprising performing at least one of reverting.

The aligned bit depth is a higher bit depth between a bit depth of the original luminance component and a bit depth of the original saturation component, and the method includes a component having a lower original bit depth. 8. The video encoding method of claim 7, further comprising scaling to match the aligned bit depth.

Determining a bit depth difference between a bit depth of the original luminance component and a bit depth of the original saturation component;
8. The video encoding method of claim 7, further comprising: left shifting a coefficient of a component having a lower original bit depth by the bit depth difference.

The video encoding method of claim 10, further comprising, after the inverse color transform, right shifting the coefficients of the component having the lower original bit depth by the bit depth difference.

The video encoding method of claim 7, wherein the luminance component, the first saturation component, and the second saturation component are associated with a residual transform block.